DE102010048054A1 - Device for fixing folded sheet, comprises rotated coil body and folded sheet which is wound on coil body, where one end of folded sheet is connected with coil body by mounting device in detached manner - Google Patents

Abstract

The device comprises a rotated coil body (1) and a folded sheet (2) which is wound on the coil body. One end (3) of the folded sheet is connected with the coil body by a mounting device in a detached manner. The mounting device releases the end of the folded sheet. The other end is coupled with a coupling area of a mast. An independent claim is also included for a method for fixing a folded sheet.

Description

The invention relates to a device and a method for fixing a folded film and a method for unfolding a fixed, folded film.

In space travel, so-called solar or solar gliders are used. Here, the light pressure of solar radiation is used to drive these gliders. An integral part of propulsion of these sailors is a possibly very large awning, which consists of extremely thin and one-sided highly reflective films. In this case, it may be necessary to use sail sheets with dimensions of 100 m × 100 m or more. Such films can not be transported in unfolded state in orbit.

To transfer the slides into orbit, they can be folded, for example. After transporting the folded films into orbit, they can then be unfolded and thus used for the drive.

This results in the need to fix the films for transport and in particular for the ascent phase in a rocket so that the smallest possible volume and the film forms by their Faltungsart no closed cavities, which then during the rise phase by the drop of the would inflate external atmospheric pressure.

In addition, there is the need to protect the folded film during the entire transport process to unfold against environmental pollution, in particular loads due to mechanical dynamic effects, temperature and pressure changes.

The DE 102 41 618 B4 discloses a method for stowing and deploying large area foils, particularly sailboard sail surfaces. In this case, the publication describes that film webs are rolled up into coils. After winding the films, the resulting coils are rolled from their center to so-called coils (coils) on a can-shaped volume, the coils are stowed in transport containers.

The technical problem arises of providing a device and a method for fixing a folded film as well as a method for unfolding a fixed, folded film which allows a folded film to be fixed with as few mechanisms and / or components as possible, in particular no protective container or Transport container, which makes sense only for the transport phase and after unfolding would be just useless mass needed and ensures a simple and secure folding, fixation and deployment.

A device for fixing a folded film is proposed.

A film, in particular a triangular-shaped film, for. B. a film of a sunshade, is converted into a folded state by the film in a first phase rolled up into a roll or zigzag-shaped (accordion-shaped) is folded. Here, the rolling can be done to a winding, for example, an inflatable axle body. After winding the axle body is removed and the now hollow cylindrical winding pressed together, whereby, as well as after the accordion-like folding, a gurtförmiger or cuboid body arises. Here, a longitudinal side of the cuboid body is longer than an end face of the cuboid body. Thereafter, the cuboid body is folded such that a first end face is placed on a second end face or disposed above it. It is thus carried out a folding around a central axis of the cuboid body, wherein the central axis is orthogonal to a central longitudinal axis of the cuboid body.

The thus folded film is referred to below as a folded film. This now has two sections or legs, wherein a first end of the folded film is defined as the end to which the two sections or legs of the folded film are connected. A second end is the end of the folded film to which the previously defined sections or legs of the folded film are not connected, in particular the second end of the folded film has two free dividing ends, namely a first free end of the first section or of the first leg and a second free end of the second section or second leg.

According to the invention, the device comprises at least one rotatable bobbin. The bobbin can be made cylindrical or hollow cylindrical. The folded film can be wound onto the at least one rotatable bobbin, wherein the previously defined first end of the folded film can be detachably connected to the bobbin by means of a fastening device. For example, the first end can be clamped by means of the fastening device to the bobbin. This results in an advantageous manner that the folded film for winding mechanically fixed to the rotatable bobbin can be connected. During unwinding, in particular before the unfolding or unfolding of the folded film, it can be released from the bobbin. Due to the and unwinding results in an advantageous manner a simple and reliable and secure fixing and transporting a film, which is feasible with simple mechanisms and a small number of components.

In a further embodiment, the at least one fastening device connects the first end of the folded film to the bobbin if the wound, folded film encloses the bobbin with at least one complete wrapping. A complete wrapping of the bobbin here means that the folded film encloses at least a portion of a lateral surface of the bobbin along its circumference at least once. Furthermore, the at least one fastening device releases the first end of the folded film if the wound, folded film surrounds the bobbin with less than one complete wrapping, in particular enclosing only a predetermined portion of the lateral surface of the bobbin along its circumference. This achieves in an advantageous manner that the folded film is mechanically fixedly connected to the bobbin in a wound state, however, is released in time from the bobbin during unwinding.

In a further embodiment, at least one further end of the folded film is coupled to a coupling region of a mast, wherein the mast is a foldable mast. A foldable mast can be foldable and unfoldable here. Preferably, the first free part end of the second end is coupled to a coupling region of a first foldable mast and the second free part end of the second end is coupled to a coupling region of a second foldable mast. The coupling refers to a mechanical coupling, preferably a non-detachable, but variable in length mechanical coupling. Preferably, the first free dividing end is mechanically coupled to a tip of a first mast and the second free dividing end is coupled to a tip of a second mast. The at least one or both masts are in this case preferably roll-foldable. Furthermore, the at least one or the masts are preferably arranged relative to the bobbin so that the removal direction of the foldable masts relative to the respective mast is perpendicular to a central axis of rotation of the bobbin. As a result, an unfavorable as possible unfolding by a preferably simultaneous deployment or unrolling of the folded masts is possible, since in this case the Entfaltrichtung the foldable masts the Enttrollrichtung the folded film from the bobbin corresponds.

In a further embodiment, the at least one end of the folded film is coupled via a constant-force spring to the coupling region of the at least one mast. Analogously to the preceding embodiments, the first free part end of the second end is preferably coupled via a first constant force spring to the coupling region of a first mast and the second free part end of the second end to the coupling region of a second mast via a second constant force spring. This results in an advantageous manner that a voltage between the coupling region of the mast and the end of the folded film is independent of a distance of the coupling region of the mast from the respective divisional to a predetermined mechanical stress, for example, to 2 Newton, limited and always guaranteed ,

In a further embodiment, a rotational movement of the at least one bobbin can be released and / or blocked and / or braked. During transport of the wound, folded film, a rotational movement of the bobbin, for example, be blocked. During a winding operation of a folded film, a rotational movement of the bobbin can be released. During a unwinding operation of a wound, folded film, the rotational movement of the bobbin can be braked with a predetermined braking force. This results in an advantageous manner secure transport, a speedy winding and a controlled unwinding of a folded film with a predetermined unwinding speed.

In a further embodiment, the at least one bobbin and / or the at least one mast is attached to a common base plate. Preferably, the bobbin and the two previously explained masts are attached to a common base plate. Further, a tip of the film not yet formed into a folded film may be attached to the bobbin or to the common base plate. For example, if the film is a triangular film, then a first tip of the film not yet transferred to a folded state may be attached to the bobbin or base plate, while the other two tips of the triangular film after folding to the folded film will be the first and second forming the second free dividing end of the folded film. If these are each coupled to a tip of a mast, which is also fastened to a base portion of the mast on the common base plate, so can be spanned by a preferably simultaneous deployment or unrolling of the masts, the triangular foil, the first end of the bobbin or on attached to the base plate and the other two ends are now attached to tips of unrolled or unfolded masts. This results in an advantageous manner as simple as possible clamping a folded film and a simple and compact as possible Transport, since all necessary components can be arranged on a common base plate.

The invention further relates to a method for fixing a folded film. Here, the folded film is wound on at least one rotatable bobbin, wherein a first end of the folded film is detachably connected to the bobbin. This results in an advantageous manner a simple and feasible with a few components fixation of a film for transport into an orbit.

In a further embodiment, the first end of the folded film is mechanically releasably connected to the bobbin if the wound, folded film encloses the bobbin with at least one complete wrapping. Further, the first end of the folded film is released from the bobbin, if the wound, folded film surrounds the bobbin with less than a complete wrapping, in particular encloses only a predetermined proportion of a lateral surface of the bobbin along its circumference. This results in an advantageous manner that a folded film is fixed in the wound state on the bobbin, wherein the film is released in time from the bobbin on settlement.

Furthermore, the invention relates to a method for unfolding a fixed, in particular wound on a rotatable bobbin, folded film, wherein the folded film is wound in a fixed state on a rotatable bobbin. A first end of the folded film is releasably connected to the bobbin. At least one further end, in particular the preceding first and second dividing ends of the folded film, are each connected to a coupling region of at least one folded, in particular roll-folded, mast, in particular mechanically connected. Here, the folded film is unfolded, in which the folded mast is deployed in a predetermined direction or the folded masts are preferably deployed simultaneously in the predetermined direction. This results in an advantageous manner easy to be performed unfolding of a wound on a rotatable bobbin folded film. In particular, a speed of deployment of the folded film may be accomplished by controlling a speed of deployment of the folded mast (s). Alternatively or cumulatively, as described above, the speed of deployment of the folded film can be controlled or regulated by means of a predefined braking action of the rotatable bobbin during a rotation of the bobbin.

Here, two alternatives for unfolding the folded film by means of a deployment of folded masts are conceivable. In a first alternative, ends, in particular the first and the second divisional ends of the folded film, are connected to coupling regions, in particular tips, of folded, in particular roll-folded, masts, such that the folded films are unfolded simultaneously, in particular during a simultaneous unfolding of the folded masts an awning is stretched or hoisted.

In a second alternative, ends, in particular the first and the second divisional ends, of the folded film are connected to tips of masts, for example via cable winches, so that the foldable masts are fully deployed first and thereafter, for example via a preferably simultaneous actuation or rotation of the masts Winches, the corresponding ends of the folded film are pulled towards the tips, whereby thereby the film is unfolded, in particular an awning is stretched or hoisted.

The invention will be explained in more detail with reference to an embodiment. The figures show:

1 a cross section through a rotatable bobbin,

2 an isometric view of a device for fixing a folded film and

3 a plan view of a device for fixing a folded film.

Hereinafter, like reference numerals designate elements having the same or similar technical features.

In 1 is a cross section through a rotatable bobbin according to the invention 1 shown. It is further shown that on the hollow cylindrical bobbin 1 a folded foil 2 is wound up. The foil 2 is preferably a polyimide film coated on one side highly reflective. The folded foil 2 hereby has a first end 3 and a second end, the second end having a first divisional end 4.1 and a second divisor 4.2 includes. The first divisional 4.1 Here is a constant force spring 5 with a tip, which constitutes a coupling region, of a roll-folded mast 7 coupled. In an analogous way, the second divisor is 4.2 with a tip of another roll-folded mast 7 coupled. In 1 is shown that the folded film 2 with more than a complete wrapping on the hollow cylindrical rotatable bobbin 1 is wound up. A section 8th of the bobbin 1 This is a hinge 9 hinged around, ie with respect to a central axis of rotation 10 of the bobbin radially outwardly movable. This can be the hinge 9 a biased rotation spring biased with a predetermined torque. Wraps the folded film 2 the bobbin 1 with more than one complete wrapping, the effect of the folded film 2 on the section 8th of the bobbin 1 applied force a positive connection of the section 8th with the bobbin 1 and thus the clamping of the first end 3 in a slot 11 that is between the section 8th and the remaining bobbin 1 is trained. Wraps the folded film 2 the bobbin 1 with less than a complete wrapping, so eliminates the of the folded film 2 on the section 8th applied force, the section 8th can be opened and thus gives the first end 3 the folded foil 2 free. This ensures that the folded film 2 reliable from the bobbin 1 at a deployment of the folded film 2 can solve. In addition, the flap section is 8th dimensioned such that it is the first end 3 not jammed in its entire height. In particular, a part of the first end protrudes 3 in the from the bobbin 1 enclosed cavity into it. Thus, from the folded film 2 no closed cavities were formed, which would then inflate during the ascent phase due to the drop in external atmospheric pressure.

In 2 is a schematic, isometric view of a device for fixing a folded film 2 shown. Here is a base plate 13 shown on which the rotatable bobbin 2 is arranged rotatably mounted. Next are roll-folded masts on the base plate 7 arranged, the respective coupling areas, in particular at the tips of the roll-folded masts 7 , exhibit. The folded foil 2 is with a first divisor 4.1 via a constant force spring 5 with the top of a roll-folded mast 7 coupled. Next is a second divisional 4.2 the folded foil 2 via a constant force spring 5 with a tip of another roll-folded mast 7 coupled.

In 3 is a schematic plan view of a device for fixing a folded film 2 shown. Here are on a base plate 13 four rotatable bobbins 1 arranged rotatably mounted. Next are on the base plate 13 four roll-up masts 7 arranged, each having a tip. The on the bobbins 1 wound up folded films 2 , in particular their ends 4.1 . 4.2 , are with the tips of roll-folded masts 7 about in 3 not shown Konstantkraftfedern mechanically coupled. In 3 This is an unwinding direction of the roll-folded masts 7 about arrows 14 indicated. Will the roll-folded masts 7 in the with the arrows 14 Simultaneously unrolled indicated Enttrollrichtung, so are the folded films 2 from the bobbins 1 unwound and thus spanned. Includes the folded film in this process 2 a bobbin 1 with less than a complete wrap, the folded films will come off 2 from the bobbins 1 , The bobbins 1 can then from the base plate 13 removed (fly-away component). It is not shown that the folded sheets are triangular in an unfolded state with a tip of the unfolded sheet 2 mechanically with the base plate 13 is coupled.

LIST OF REFERENCE NUMBERS

1

bobbins

2

foil

3

first end

4.1

first divisional

4.2

second divisional

5

Constant force spring

7

mast

8th

section

9

hinge

10

central axis of rotation

11

slot

13

baseplate

14

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QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10241618 B4 [0006]

Claims (9)

Device for fixing a folded film ( 2 ), characterized in that the device comprises at least one rotatable bobbin ( 1 ), wherein the folded film ( 2 ) on the at least one bobbin ( 1 ) is windable, wherein a first end ( 3 ) of the folded film ( 2 ) by means of a fastening device releasably connected to the bobbin ( 1 ) is connectable. Apparatus according to claim 1, characterized in that the at least one fastening means the first end ( 3 ) of the folded film ( 2 ) with the bobbin ( 1 ), if the wound folded film ( 2 ) the bobbin ( 1 ) encloses at least one complete winding, wherein the at least one fastening device, the first end ( 3 ) of the folded film ( 2 ) releases, if the wound folded film ( 2 ) the bobbin ( 1 ) encloses with less than a complete wrap. Device according to one of the preceding claims, characterized in that at least one further end ( 4.1 . 4.2 ) of the folded film ( 2 ) with a coupling region of a mast ( 7 ), the mast ( 7 ) is foldable. Device according to claim 3, characterized in that the at least one further end ( 4.1 . 4.2 ) of the folded film ( 2 ) via a constant force spring ( 5 ) with the coupling area of the mast ( 7 ) is coupled. Device according to one of the preceding claims, characterized in that a rotational movement of the bobbin ( 1 ) is releasable and / or blockable and / or brakable. Device according to one of the preceding claims, characterized in that the bobbin ( 1 ) and / or the at least one mast ( 7 ) on a base plate ( 13 ) is attached. Method for fixing a folded film ( 2 ), characterized in that the folded film ( 2 ) on at least one rotatable bobbin ( 1 ), wherein a first end ( 3 ) of the folded film ( 2 ) detachable with the bobbin ( 1 ) connected is. Method according to claim 7, characterized in that the first end ( 3 ) of the folded film ( 2 ) with the bobbin ( 1 ), if the wound folded film ( 2 ) the bobbin ( 1 ) encloses at least one complete wrapping, the first end ( 3 ) of the folded film ( 2 ) from the bobbin ( 1 ) is solved if the wound folded film ( 2 ) the bobbin ( 1 ) encloses with less than a complete wrap. Method for unfolding a fixed, folded film ( 2 ), characterized in that the folded film ( 2 ) in a fixed state on at least one rotatable bobbin ( 1 ), wherein a first end ( 3 ) of the folded film ( 2 ) detachable with the bobbin ( 1 ), at least one further end ( 4.1 . 4.2 ) of the folded film ( 2 ) with a coupling region of a folded mast ( 7 ), wherein the folded film ( 2 ) is unfolded by the folded mast ( 7 ) is unfolded.

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